Lin has a vein between his eyes, Li doesn’t (Grammy Sharon first noticed that)

Li’s ears are a little pointy on the top (see picture)

Li actually has a very hard-to-find birth mark on the back of his knee, the skin folds hide it really well and I just noticed it the other day

Lin’s face is a bit longer than Li’s

Lin’s belly button is an outie, Li’s is normal

And that’s pretty much the list, Lin and Li have the same height and same weight now, if there’s something between identical and fraternal twins, it will be them. Michael and I are curious to see what they will look like in the future since for now, we don’t think they look like either of us but we are pretty sure they are our kids since “their eyes are a little bit slanted”, according to Michael, lol…